APWA Uniform Color Codes
Do you know what's below?
Utility color codes are used to identify existing underground utilities in construction areas with the intent of protecting them from damage during excavation. This is done with either flags or a special spray paint, neither of which will cause long-term harm to your lawn.
The American Public Works Association (APWA) Uniform Color Codes for temporary marking of underground utilities are listed below:
Temporary Survey Markings
Electric Power Lines, Cables, Conduit and Lightning Cables
Communication, Alarm or Signal Lines, Cables or Conduit
Gas, Oil, Steam, Petroleum or Gaseous Materials
Sewers and Drain Lines
Reclaimed Water, Irrigation and Slurry Lines